After downloading and installing the update, check the issue is fixed or not.
These are the steps to follow for updating Windows on your computer. If it does not notify you, then follow the below steps. Unlike the previous versions of the OS, Windows 10 notifies users as soon as an update is available. If you are facing Windows Defender won’t start error in Windows, try to update your computer with the latest version. Microsoft regularly pushes the latest updates to the compatible models. Keeping up your device update will solve all kinds of errors on a computer. Usually, a technical glitch will occur if the software is outdated.